Proper K3 filter/options selection?

I fell in love with the three Elecraft K3's that we had at ST0R and have decided to order a new one for myself to replace the one that was lost in transit upon return from South Sudan. (all Intrepid-DX Group gear is lost)
 
Each of the K3's at ST0R were slightly different. I brought a bare-bones model, however the better filtered models were noticably better.
 
I am ordering in the next day or two in hopes to beat the price increase and to get it in time for my next DXpedition to Rotuma in late Sept.
 
Can you experts check this configuration and tell me if it will be ideal for CW/SSB/RTTY?
 
Thanks,
 
Paul N6PSE
[hidden email]
 
K3/100-F
K3 100W Xcvr. (Assembled)
$2199.95
ea.
1
$2199.95
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KAT3-F
K3 ATU (Fact. Installed)
$339.95
ea.
1
$339.95
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KFL3A-1.8K
K3 1.8 kHz, 8 pole filter
$130.95
ea.
1
$130.95
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KFL3A-2.1K
K3 2.1 kHz, 8 pole filter
$130.95
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1
$130.95
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KFL3A-250
K3 250 Hz, 8 pole filter
$130.95
ea.
1
$130.95
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KFL3A-400
K3 400 Hz, 8 pole filter
$130.95
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1
$130.95
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KRX3-F
K3 2nd RX (Fact. Assm.)
$659.95
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1
$659.95
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KUSB
Univ. Ser Bus Adapt.
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$39.95
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[Jim Brown-10]

On 8/15/2011 9:33 AM, [hidden email] wrote:
> Can you experts check this configuration and tell me if it will be ideal for CW/SSB/RTTY?

You're ordering more filters than you need.  I would go with 2.8 kHz,
1.8kHz and 250 Hz in the main RX, 2.7 kHz and 250 Hz in the second RX.  
You're only likely to use diversity with CW on the lower bands. The
2.8kHz filter is flatter in the passband, so reduces incidental AM with
RTTY, which might help in a multi-station environment.

And unless you're a total mechanical clutz or too busy to build, I
strongly recommend buying the kit. It's screw-together, takes about 10
hours with one RX, another 2-3 hrs for 2nd RX.  Big cost savings, all
the modules are pre-tested, and you'll know how to pull it apart to work
on it or trade modules when things go wrong.

73, Jim K9YC
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[Rick Stealey]

If you want a separate receive only antenna port in addition to Antenna A/B you might consider the KXV3A option.
i.e. for  a Beverage on 160.  There is no way you can transmit on that port to accidentally damage the receive
antenna.
I am assuming you are equipping only the sub-rx with the narrow filters, for split operation.
By the way, congratulations to whoever it was at ST0R who copied my little FT-100 on 20 cw,
while my K3 was out in Calif for repairs at the mother ship.
Rick  K2XT



     
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[Tony Estep]

On Mon, Aug 15, 2011 at 11:33 AM, [hidden email] <[hidden email]>
 wrote:

> ...I am ordering in the next day or two...

============

Paul,
First, thanks for all you guys did. I never worked you but I think I worked
all the other ops, some more than once. Great operating by all, and a hugely
successful undertaking.

Very sad about the lost gear. Here's hoping it'll show up in due course.

I can attest that you can get by nicely for DXing with 2 receivers, 2.7 and
0.4 8-pole in main, 2.7 only in sub-rx. Of course it's nice to have more,
but honestly I've never felt that I had to have 'em.

Whatever you get, you're 100% right that the K3 is the dream DXpedition rig.
Good luck!

73,
Tony KT0NY




--
http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352
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[Joe Subich, W4TV-4]

I agree with Jim that you are over ordering the filters.

That said, I would stick with the stock 2.7 KHz in both main and sub
RX.  Quite simply, there isn't enough difference in selectivity or
IMD performance to justify the cost of the change.

Add the 1.8 KHz for "narrow SSB" in the Main RX (you certainly don't
need both 2.1 KHz and 1.8 KHz).  I would also go with either the
Elecraft 500 Hz or INRAD 400 HZ CW filter in both receivers (400 Hz
to be wide enough for RTTY) and add the 200 Hz for "narrow" CW.

There simply is not enough difference between the 500/400 Hz filters
and the 250 Hz (340 - 370 Hz nominal) to justify both 400 and 250 in
the same receiver.

I also recommend the KXV-3 for support of separate receive antennas
and the IF output.

73,

    ... Joe, W4TV


On 8/15/2011 1:11 PM, Jim Brown wrote:

> On 8/15/2011 9:33 AM, [hidden email] wrote:
>> Can you experts check this configuration and tell me if it will be ideal for CW/SSB/RTTY?
>
> You're ordering more filters than you need.  I would go with 2.8 kHz,
> 1.8kHz and 250 Hz in the main RX, 2.7 kHz and 250 Hz in the second RX.
> You're only likely to use diversity with CW on the lower bands. The
> 2.8kHz filter is flatter in the passband, so reduces incidental AM with
> RTTY, which might help in a multi-station environment.
>
> And unless you're a total mechanical clutz or too busy to build, I
> strongly recommend buying the kit. It's screw-together, takes about 10
> hours with one RX, another 2-3 hrs for 2nd RX.  Big cost savings, all
> the modules are pre-tested, and you'll know how to pull it apart to work
> on it or trade modules when things go wrong.
>
> 73, Jim K9YC
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[Jim Brown-10]

On 8/15/2011 10:14 AM, Rick Stealey wrote:
> If you want a separate receive only antenna port in addition to Antenna A/B you might consider the KXV3A option.

Yes, definitely do this.

Jim
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[Robby.VY2SS]

Paul,
I would suggest getting an 8 pole 500 hz filter instead of the 400 hz one. You can order it from INRAD for the same price. It gives you a little more spread between the two filters.
-Robby
VY2SS